My cousin works for AA and has informed me that too many people are trying to be the next Dave Peters(the pudding guy)With all the rewards about to be distributed, it will be very difficult for you to redeem the miles for flights. Paying customers come first. Only a few spots are held per flight for FF. High volume spots will be near impossible to redeem ie. NYC, CHI, Orlando, HW, Paris, London, Vegas et al.
Most likely to do this you will have to take off peak flights with restrictions and stopovers with and increased lead time prior to booking flights. So b4 you decide to get that next rain check for 100 boxes of special K be careful and do some research.